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Re: Problem with HIGHMEM implementation for 32 bit mips-el port

To: Rishabh@soc-soft.com
Subject: Re: Problem with HIGHMEM implementation for 32 bit mips-el port
From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 31 Jan 2005 21:14:04 +0000
Cc: linux-mips@linux-mips.org
In-reply-to: <4BF47D56A0DD2346A1B8D622C5C5902C472FE1@soc-mail.soc-soft.com>
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References: <4BF47D56A0DD2346A1B8D622C5C5902C472FE1@soc-mail.soc-soft.com>
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On Mon, Jan 31, 2005 at 12:49:53PM +0530, Rishabh@soc-soft.com wrote:

> I am working on MIPS32 port of linux (kernel version 2.4.18) for R4000
> processor. While compilation was fine but the kernel boot up panics in
> "init".

I doubt you're really using an R4000, a 1991 processor which's successor,
the R4400 started shipping in 1993.  Probably you're talking about the
MIPS 4K series instead?

> I have 128MB RAM on the system where 64MB is located at 0x00000000
> physical address and the other 64MB is located at 0x20000000.
> 
> Also how is the address map for mips defined (highmem)?

See <asm/fixmap.h>.  It's basically identical to 32-bit Intel.

  Ralf

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